package cn.com.util;


import sun.misc.BASE64Encoder;

import java.security.MessageDigest;

/**
 * author: yue
 * date: 2018/01/26
 * description:
 */
public class EncryptUtil {


    public static void base64(){
        BASE64Encoder base64Encoder=new BASE64Encoder();

    }

    public static String getSha1(String str){
        if(str == null || str.length()==0){
            return null;
        }
        char hexDigits[] = {'0','1','2','3','4','5','6','7','8','9',
                'a','b','c','d','e','f'};
        try{
            MessageDigest mdTemp = MessageDigest.getInstance("SHA1");
            mdTemp.update(str.getBytes("UTF-8"));
            byte[] md = mdTemp.digest();
            int j = md.length;
            char buf[] = new char[j*2];
            int k = 0;

            for(int i = 0;i<j;i++){
                byte byte0 = md[i];
                buf[k++] = hexDigits[byte0 >>> 4 & 0xf];
                buf[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(buf);
        }catch(Exception e){
            return null;
        }
    }
}
